First off... the severe duty drive belt
is a must! (it lasts SO much longer than a stock belt)
Combining all 3 will give you a lot of hill climbing torque, but
NOT additional top speed.
Everything that I've read about people doing all 3 have been VERY happy getting the extra torque out of their 9.5hp FE290 engine!
And BD is on the right track... when mixing a counter clockwise big block with the clockwise transaxle,
your gear ratio changes because your using your reverse gearing to go forward,
and that
alone supplies all the torque you'll ever need, and negates the need for the mods to the driven clutch!
AND... most of the good kits (Clone or Briggs) replace the belt and driven clutch anyway! (depending on what big block kit your looking at)
Granted, the price is right if you plan on keeping your stock engine for a while, and you'd like the extra "grunt" to help going up hills!
